2020 TOYOTA PRIUS PRIME radiator cap

588
PRIUS PRIME_OM_OM47C77U_(U)
7-3. Do-it-yourself maintenance
Engine compartment
Engine coolant reservoir ( P. 592)
Fuse boxes ( P. 638)
Engine oil level dipstick ( P. 589)
Engine oil filler cap ( P. 590)
Brake fluid reservoir ( P. 598) Washer fluid tank (
P. 600)
12-volt battery ( P. 595)
Power control unit coolant
reservoir ( P. 592)
Radiator ( P. 594)
Condenser ( P. 594)
Electric cooling fans1
2
3
4
5
6
7
8
9
10
11

PRIUS PRIME_OM_OM47C77U_(U)
5937-3. Do-it-yourself maintenance
7
Maintenance and care
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high quality ethylene
glycol based non-silicate, non-amine, non-nitrite, and non-bora te coolant with
long-life hybrid organic acid technology.
U.S.A.:
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deion-
ized water. (Minimum temperature: -31 F [-35 C])
Canada:
“Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45% deion-
ized water. (Minimum temperature: -44 F [-42 C])
For more details about coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine/power control unit c oolant reservoir
caps, drain cock and water pump.
If you cannot find a leak, have your Toyota dealer test the cap and check for
leaks in the cooling system.
WARNING
■ When the hybrid system is hot
Do not remove the engine/power control unit coolant reservoir c aps.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
■ When adding coolant
Coolant is neither plain water nor straight antifreeze. The cor rect mixture of
water and antifreeze must be used to provide proper lubrication, corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
■ If you spill coolant
Be sure to wash it off with water to prevent it from damaging p arts or paint.

784Alphabetical index
PRIUS PRIME_OM_OM47C77U_(U)
P position switch ..................... 343
Panic mode .............................. 275
Parking assist sensors Intuitive parking assist .......... 433
Parking Support Brake function ............................... 443
S-APGS (Simple Advanced Parking Guidance
System) .............................. 455
Parking brake ........................... 349 Operation .............................. 349
Parking brake engaged
warning buzzer ................... 349
Parking lights ........................... 350
Light switch ........................... 350
Replacing light bulbs............. 648
Parking lock ............................. 343
Parking Support Brake
function .................................. 443
PCS (Pre-Collision System) .... 381
Enabling/disabling the system ......... ....................... 385
Function ................................ 381
Warning light ......................... 663
Personal lights ......................... 528 Switch ................................... 529
Wattage ................................ 726
Plug-in hybrid system ............... 86 Driving tips ............................ 105
EV auto mode ......................... 87
EV driving range ................... 108
EV mode ................................. 87
EV/HV mode selection switch ................................... 90
Features.................................. 86
How to charge....................... 146
HV mode ................................. 87
Hybrid battery (traction battery) charge mode ........... 87 Power control unit coolant ..... 592
Capacity................................ 723
Checking............................... 592
Preparing and checking before winter ...................... 495
Radiator ................................ 594
Power outlets ........................... 541
Power sources ......................... 131
Power steering (Electric Power Steering)..................... 490 Function ................................ 490
Warning light......................... 663
Power switch ........................... 336 Auto power off function ......... 338
Changing the power
switch modes ..................... 338
If your vehicle has to be
stopped in an emergency ... 653
Starting the hybrid system .... 336
Power windows ....................... 312
Catch protection function ...... 313
Door lock linked window operation ............................ 313
Jam protection function ........ 313
Operation .............................. 312
Window lock switch .............. 312
Pre-Collision System (PCS).... 381
Enabling/disabling the system .......... ...................... 385
Function ................................ 381
Warning light......................... 663
P

785Alphabetical index
PRIUS PRIME_OM_OM47C77U_(U)
Radar cruise controlDynamic radar cruise control with full-speed range .......... 403
Radiator .................................... 594
Radio
*
RCTA (Rear Cross Traffic Alert) ....................................... 428 Blind Spot Monitor function ............................... 425
Rear Cross Traffic Alert function ............................... 428
Rear Cross Traffic Alert
(RCTA) .................................... 428 Blind Spot Monitor function ............................... 425
Rear Cross Traffic Alert function ............................... 428
Rear passengers’ seat belt
reminder light ........................ 665
Rear seat .................................. 301
Rear side marker lights ........... 350
Light switch ........................... 350
Replacing light bulbs............. 648
Rear turn signal lights............. 348
Replacing light bulbs............. 648
Turn signal lever ................... 348
Rear view mirror Inside rear view mirror .......... 308
Outside rear view mirrors...... 310
Rear view monitor system
*
Rear window defogger .... 504, 515
Refueling .................................. 368 Capacity ................................ 720
Fuel types ............................. 720
Opening the fuel tank cap ..... 370
When the fuel filler door cannot be opened............... 371
Regenerative braking ................ 94
Remote Air Conditioning System ................................... 522 Replacing
Electronic key battery ........... 635
Fuses .................................... 638
Light bulbs ............................ 643
Tires...................................... 617
Wiper insert .......................... 632
Reporting safety defects for U.S. owners...................... 754
Resetting the message
indicating maintenance is
required.................................. 576
Road accident cautions .......... 102
S-APGS (Simple Advanced Parking Guidance
System) .................................. 455
S-FLOW mode.................. 501, 513
Safety Connect .......................... 76
Seat back pockets ................... 535
Seat belts ................................... 30 Adjusting the seat belt ............ 31
Automatic Locking Retractor (ALR) .................... 31
Child restra int system
installation ............................ 64
Cleaning and maintaining
the seat belt........................ 572
Emergency Locking Retractor (ELR) .................... 31
How to wear your seat belt ..... 30
How your child should wear the seat belt.......................... 32
Pregnant women, proper seat belt use ......................... 33
Reminder light and buzzer.... 664
Seat belt extender .................. 32
Seat belt instructions for Canadian owners ............... 755
Seat belt pretensioners........... 31
SRS warning light ................. 663
Seat heaters ............................. 526
R
S
*: Refer to “NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.